Agricultural implement



Dec 13 1949 F. T. BLAYDEs l-:TAL

AGRICULTURAL IMPLEMENT 2 Sheelbs-Sheet 1.

Filed June 15, 1946 Dec 13 1949 F. T. BLAYDES ET AL AGRlCULTURALIMPLEMENT 2 Sheets-Sheet 2 Filed June l5, 1946 das,

Patented Dec. 13, 1949 UNITED STATES PATENT 0F ICEv AGRICULTURALIMPLEMENT Frederick T. Blaydcs` and Jack Launiam Canton, Ill., assgnorsto International Harvester Company, a corporation oINew JerseyApplication June 15, 1946;,Serial No. 672,011

(Cl. Sil-.50),

4 Claims. l

This invention relates to agricultural implements andparticularly toimplements adapted to be mounted on a tractor or other support. Morespecifically the invention concerns implements of the tool-bar type..

An object of this invention is to provide improved means for attachingan implement to a tractor or other support.

Anotnerobject of the invention is to provide improved means or mountingupon a tractor an implement of .the transverse toobbar type Whereinmeans are Provided for accommodating independent vertical v.floating.movement of the ends or the tool bor ordertnet the earth-Working toolsmay properly l-.fr; l1otv the contour .of the groundvIn tbe absence ofsuch provision, oi coursethe ends of a tool-bar implement will notproperly follow theeround, andzuoon encounter ins enuneven-surfecethetoolsa-t one end-of the tool barmity Oper-ate .at a shallower depththan the tools at the other ond-or may ride entirely out of the ground.

Another .object of the, inventionk is to provide in atraetorfmountedimolement of thetransverse toolfbar type, means forpivotally connecting the tool bar to .the lifting, mechanism thereforfor movement thereof eboutloneitodinel axeslocated atspaced points onthe bar.

.Another .object of the invention; is ino-providein a vegetablecultivator of the double toolfbar type novel, means for connecting thetool bars .together to ieoilitateassembly and replacement of parts-.Other objects and advantages ofthe invention will become clear from.the-following detailed de scriptlon wnenread .in conjunction Withthe`ao...

comoenyine draw-ings, wherein;

Figure 1 isa view in side elevation ofatractor having mounted thereuponan implement embodying the features of' the present invention;

Figure 2 is an elevation of the implement traveling over level groundand Showing a portion of the lifting mechanism by which the ,implementyis mounted` upon the tractor;

Figure 3 is an elevation similar to 'Figure 2 but showing the. positionof the tool-bar implement when traveling over uneven ground; and

.Figure 4 isan enlarged detail in section showing the connecting meansbetween the tool bars.

Referringtothe drawings, the 4implement of the r presentV invention isshown Imounted upon atractor lil; Although only one side of the tractoris shown, is may be understood that on each side is mounted a supportingstructure generally vindicated at LI, each of which includes a plate l2mg laterally therefrom a: square supporting beam,

i4; 'To the :omtrend of. the beamis affixed aA plate l5 and the beam isbraced by a strap-lsecured to the plates lf2-:and l5.

lsecured tothe beam M isa bracket il. While oniyone of these bracketsisshown in the drawing it be understood. that two such brackets aremounted upon the beam on each side of the tractor. Each of' the bracketsi'lV on the beams lfliat opposite sides of the tractor serves to supportimplementlifting-assemblies, the inner assemblies being designated inFigures 2 and 3 by the numeral I'B'and the `outer assemblies by thenumeral I9: Each of these lifting assemblies comprises arpaireofvertically spaced generally parallel links 2l] and^2l -pivotallyconnected at their forward ends at vertically spaced locations on the`bracket I1. The rear ends of the links `2c andi! I are pivotallyconnected'at vertically spaced locations to a standard 22, at the lowerend of which is -a .base yportion 23 extending at right angles thereto.The parallel linksZand 2| are raised and lowered about their pivots uponthe bracket i1 by a rockable structure generally indicatedat 24 andcomprising a bail 25 rocked by a rock arm26 mounted upon the tractor andconnected to the bail by aconnecting rod 21. A rock arm similar to 26 ismounted upon the opposite sideof the tractor and is similarly connectedto the parallel link lifting'assem'blies on that side of the tractor.Each of the rock arms 25 is rocked by a mechanism not shown butpreferably by power means deriving. energy from .the tractor powerplant.

Since each of the 'lifting assemblies I 8 and I9 is individuallypivotally mounted upon its respective bracket il upon the beam I4, itisunderstood that each lifting assembly may rise endian independentlyofthe other, Each lifting assembly is nexibly connected` to the rockablestructure 24 by means ofr a pushrod 28, the upper end of which ispivoted upon the bail 25 and the lower end upon the standard N22J Theupper endfof the rod is slidably received `in .a sleeve 2.9Ywhich servesfor the pivotal connection of the rodto thebal, and the end of therodyproj.ecting through the sleeve 2.9 has scoured, thereto a collar 3.0 tolimitthe movement of therod inone direction with respect tothe sleeve2.9, The lower portion .of therod 25 hesedjustably secured thereto-acollar 3l', anda spring 32 surrounds the rod between the coliar; 3l

and the sleeve 29 so that upward movement of the lifting assemblies I8and I9 is against the action of the springs 32.

The earth-working implement of the present invention is generallyindicated by the numeral 33 and comprises a pair of longitudinallyspaced, transversely extending tool bars 34 and 35. These tool barsextend transversely from one side of the tractor to the other betweenthe front and rear wheels thereof. Mounted upon the tool bar 34 is aplurality of earth-working tools 36, and upon the tool bar 35 a numberof tools 31, clearly shown in Figures 2 and 3.

The tool bars 34 and 35 are connected by a clamping structure generallyindicated at 38, one of which is provided for each of the liftingstructures I8, I9. Each clamping structure 38 comprises a cylindricalsleeve member 39 having secured thereto an eye-bolt 40 having a threadedshank 4I adapted to be received in an opening in the base portion 23 ofthe standard 22, the lower surface of the base 23 being shaped to t thecontour of the sleeve 39 A nut 42 is provided upon the shank 4| forsecuring the sleeve 39 to the standard 22.

Rotatably mounted in the sleeve 39 are a pair of shaft members 42a and43, the ends of which project from the sleeve 39 and are provided attheir ends with clamps 43a and 44, respectively. Each of the clamps 43aand 44 is notched to receive the square tool bars 34 and 35. The toolbars 34 and 35 are thus rockable about longitudinal axes represented bythe shafts 42a and 43.

The inner ends of the shafts 42'3L and 43 are connected by a stud bolt44a, the ends of which are threaded for reception in threaded openingsin the inner ends of the shafts. It is therefore a relatively simplematter to remove one or both of the shafts 42a or 43 to replaceimplement parts or for repair purposes,

In Figure 2 the implement is shown traveling over level ground, while inFigure 3 the ground at the right side of the tractor is lower than thatat the left side thereof. In prior tool-bar implement constructions noprovision has been made for leveling such an implement with respect tothe surface of the ground over which it is traveling so that the toolbar remains substantially rigid with respect to the tractor, and whenuneven ground is encountered, as for eX- ample that shown in Figure 3,the tools on the right-hand end of the tool bar would not travel at thesame depth as those on the left-hand end thereof so that uniformoperation could not be obtained. The tool bar is shown to have rotatedabout the connections thereof to the brackets 22 to accommodate theimplement to the contour of the ground. Thus the tools at the righthandend of the implement are permitted to travel at the same depth as thetools at the lefthand end so that uniform operation is assured.

The slight twisting or" the standards 22 incident to the turning of thetool bars 34 and 35 upon the shafts 42u and 43 is accommodated byproviding a small amount of play in the pivotal connections of theparallel links 20 and 2| to the brackets I1 and 22.

The operation of the implement of the present invention should beclearly understood from the foregoing description. Modifications may,however, be made therein without departing from the spirit of theinvention or the scope of the appended claims.

What is claimed is:

1. In an agricultural implement comprising a support, a pair oflongitudinally spaced transverse tool bars and earth-working toolscaried by each of said bars, connecting means between said bars atspaced locations thereon, each said connecting means comprising a sleevemember, a pair of shaft members rotatably received in said sleeve andprojecting from opposite ends thereof, a threaded bolt separablyconnecting the inner ends of said shafts, clamps secured to the outerends of the shaft for connection to the respective tool bars, and liftlinkage on the support connected to said sleeves for raising andlowering said tool bars.

2. In an agricultural implement comprising a support and laterallyspaced lifting 'members mounted on the support for independent generallyvertical movement with respect thereto, a longitudinally extendingsleeve member carried by each said lifting member, a shaft rotatable inthe sleeve having clamping means secured to forward and rearward endsthereof, and a pair of rigid tool-carrying members extending betweensaid lifting members and connected respectively to said forward andrearward clamping means.

3. For use with a tractor having lifting members mounted thereon attransversely spaced locations for independent movement generallyvertically relative to the tractor and an agricultural implement mountedthereupon including a pair of longitudinally spaced transverse toolcarrying bars, means connecting said bars at spaced locations thereoncomprising sleeve members extending between said bars, a pair of shaftsrotatable in each said sleeve and projecting from opposite ends thereof,means for securing the projecting ends of Said shafts to said bars,means separably connecting the inner ends of said shafts, and meansconnecting the lifting members to said sleeves.

4. For use with a tractor having lifting members mounted thereon attransversely spaced lotically relative to the tractor and anagricultural implement mounted thereupon including a pair oflongitudinally spaced transverse tool-carrying bars, means connectingsaid bars at spaced locations thereon comprising sleeve membersextending between said bars, a pair of shafts rotatable in each saidsleeve and projecting from opposite ends thereof, means for securing theprojecting ends of said shafts to said bars, the

inner ends of the shafts having threaded open? ings therein, a stud bolthaving its ends threaded for reception in said openings, and meansconnecting the lifting members to said sleeves.

FREDERICK T. BLAYDES. JACK L. BAUMAN.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 2,150,665 Tuft Mar. 14, 19392,332,616 Tuft Oct. 26, 1943 2,369,759 Smith Feb. 20, 1945 2,417,905Blaydes Mar. 25, 1947 FOREIGN PATENTS Number Country Date Australia. May16, 1930'V

